containing two dwelling units, designed for occupancy by not more than two families. ** Single-family attached dwelling (townhouse).** One of two or more residential buildings, occupying a separately recorded lot, each occupied by not more than one family
Read it in the chapter →How this ordinance defines it
The operative definition is the local one. Codes routinely subdivide a category into tiers — “day care 2, family”, “group home 2” — and attach different permissions to each, so only Chesapeake’s own text settles what this covers.